Otherwise – you should have made a backup (reboot) disk (on USB flash drive or whatever) when you installed Lion

Otherwise – you could restore your system to Snow Leopard (or whatever disk you have), then upgrade to Lion through the App Store, which will recall that you have bought it

Takes a while but worth it to clear the rubbish off the hard drive anyway. I like a good clean install from time to time

Re ML: I found that one of the settings in Mail was broken and it said that SSL was off (i.e. box unticked) when it was in fact on. So, I couldn’t use Mail in ML to get my works mail, which was a deal breaker for me (for now). I did like the Reminders App (and Notifications)

Looking forward to the final or closer versions when the bug in Mail has been fixed.

Thanks! Lol this is my spare imac so it’s not end of world but rather avoid having to copy few hundred gigs of junk.

]]>By: Jeffrey A Barclayhttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-380970
Mon, 23 Apr 2012 12:35:24 +0000http://osxdaily.com/?p=29494#comment-380970Overall – works fine, only issue I’m having is Safari crashes after 1-2 min. Here is part of the error log:

]]>By: Gaborikerhttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-380557
Sun, 22 Apr 2012 11:09:59 +0000http://osxdaily.com/?p=29494#comment-380557Hy guys.
I use the DP3 as my main system on a latest Mini.
I use my computer for everyday use..
The new DP works fine.. I dont met with crashes. I use Chrome on it, i dont like safari.
]]>By: kapshttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-380437
Sun, 22 Apr 2012 04:12:28 +0000http://osxdaily.com/?p=29494#comment-380437Is mirroring active on DP3
]]>By: Varaderohttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379660
Fri, 20 Apr 2012 07:20:17 +0000http://osxdaily.com/?p=29494#comment-379660Amazing! works perfectly! I am using DP3 as my main system and there are no issues; safari crashing was fixed, and imessage now works much better in terms of sync.
Super
]]>By: Mr. Hilarioushttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379471
Thu, 19 Apr 2012 19:06:41 +0000http://osxdaily.com/?p=29494#comment-379471beta version, wait for a better version
]]>By: adamhttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379457
Thu, 19 Apr 2012 17:31:52 +0000http://osxdaily.com/?p=29494#comment-379457I almost use only Mountain Lion from the DP1, It work nice, so better than lion or leopard when was in Development… It’s Natural, Leopard and Lion was have big OS Changes… Mountain Lion is what was Snow Leopard after Leopard, a big Clean Debug…
]]>By: Davehttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379220
Thu, 19 Apr 2012 00:37:41 +0000http://osxdaily.com/?p=29494#comment-379220Can you tell me if it puts Ad-Hoc Networks back in and I might think about updating. That is all that will make it worthwhile. As I don’t care about bugs and I am on the dev program but not actually a dev.
If you don’t know how go to the airport button and click create local network. (If its there)
Thanks
]]>By: Brett Lewishttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379218
Thu, 19 Apr 2012 00:31:16 +0000http://osxdaily.com/?p=29494#comment-379218I have been used both build 1 and build 2 on my personal and work machines. Just updated to build 3 and everything works. Amazing that you get complainers about bugs in pre-release software. That is why they have it in beta.
]]>By: Davehttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379217
Thu, 19 Apr 2012 00:20:43 +0000http://osxdaily.com/?p=29494#comment-379217To be honest neither of them were unstable for general every day use. I use my Mac running Developer Build 1 as the main operating system for about 10 hours a day and the only errors I ever got were with Safari bugging out occasionally and not being able to restart with Mail open. That was basically it apart from minor things.
]]>By: Tomhttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379196
Wed, 18 Apr 2012 23:05:16 +0000http://osxdaily.com/?p=29494#comment-379196DP1 and DP2 were basically unusable, hope this one is better.
]]>By: Release Noteshttp://osxdaily.com/2012/04/18/os-x-mountain-lion-developer-preview-3-available-for-dev-download/#comment-379164
Wed, 18 Apr 2012 20:04:38 +0000http://osxdaily.com/?p=29494#comment-379164Release Notes

OS X Mountain Lion Developer Preview 3 is prerelease software. Do not use this prerelease software in a commercial operating environment or with important data. You should back up all of your data before installing this software and regularly back up data while using the software. You will not be able to upgrade from the OS X Mountain Lion Developer Preview to the ﬁnal release.

If an installation of OS X Developer Preview 3 fails, try using Disk Utility from a Recovery HD to repair the disk.

Known Issues
– On systems with FileVault enabled, canceling the restart to the Mountain Lion Developer Preview 3 Installer may leave your system unable to present a password dialog at boot time. You
can repair the problem by holding down command-R to boot to the Recovery OS and then using Disk Utility to unlock and Repair your volume.
– Installing OS X 10.8 over 10.7.2 or earlier with FileVault turned on may fail
– Pre-Lion FileVault user accounts are not supported in this Developer Preview
– Some Apple menu items such as Restart may not work when a sandboxed app is in the foreground
– iTunes no longer syncs Notes
– Mail’s photo browser cannot access the iPhoto library
– Back to My Mac doesn’t work for the ﬁrst 5 minutes after rebooting
– DVD Player may not launch after inserting a DVD on some systems
– Most help topics are unavailable in this Developer Preview
– In the Recovery HD:
– Some icons may be missing
– Network Utility’s Lookup pane does not work
– Time Machine restoration via a AFP share does not work
– Restoring from a Time Machine backup via AFP does not work
– Migration from a Time Machine backup that excludes paths such as /System may yield an unusable system
– Brightness settings may change unexpectedly after reboot
– Display brightness may be dim after sleep or reboot
– If Mail is hidden at logout time, it may not be correctly relaunched during a subsequent login but will appear to be running
– Java applets may not work in Safari
– QuickTime screen recordings may produce corrupted videos or cause an exception when run on machines with NVDIA graphics
Game Center
– In this seed, the Game Center application will view Production data by default. Games in development will be programmatically switched to use the Sandbox server environment
– No Top Games are displayed on the Me tab and no game recommendations are shown on the Games tab
– To use Game Center in your game on OS X, you must install a provisioning proﬁle that enables Game Center for your app. Code signing, entitlements, and provisioning proﬁles are all
described in detail in Tools Workﬂow Guide for Mac
– Multiplayer gaming with Game Center between iOS and OS X is not available in this seed
– In the Game Center app, game detail information such as game provider, pricing, etc. is not displayed
– The local peer-to-peer GameKit API (GKSession, GKPeerPickerController, and related classes) is not supported

Bug Reporting
This build is being provided to you for testing and development purposes. Should you encounter any problems, please submit a bug report using the online Bug Reporter at bugreporter.apple.com/>. Please make sure to include “10.8 (12A178q)” in the bug title and description. This information will ensure that your bug is processed quickly.

When submitting a bug report, please make sure to include a Summary, Steps to Reproduce, Expected Results, Actual Results, and the diagnostic output generated by running ʻsudo sysdiagnoseʼ in the Terminal.